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目的观察左前分支阻滞的心电图Sv5改变及心向量的临床意义。方法对1424例心电图谱图形及心向量图形作回顾分析。结果Sv5≥3.5 mv可作为诊断左前分支阻滞重要辅助诊断的指标。心向量电轴左偏—45°左右F面QRS环呈逆钟向转位,环体转向左上方展开。结论心电图与心向量相结合可明确诊断,两者缺一不可。心向量是左前分支阻滞的最好诊断工具,优于心电图,在心向量图上有特征性变化,对明确诊断有指导意义。
Objective To observe the changes of electrocardiogram Sv5 and the clinical significance of left ventricular anterior branch block. Methods A retrospective analysis of 1424 electrocardiogram patterns and cardiac vector patterns was performed. Results Sv5 ≥ 3.5 mv can be used as an important diagnostic indicator of left anterior branch block. The left-hand side of the cardiac vector axis is offset by -45 ° or so. Conclusion Electrocardiogram and cardiac vector can be combined with a clear diagnosis, both indispensable. The heart vector is the best diagnostic tool for left anterior branch blockade, superior to electrocardiogram, with a characteristic change in the cardiac vector plot, which is instructive for a definitive diagnosis.